Douglas Howard Ginsburg (born May 25, 1946) is a judge on the United States Court of Appeals for the District of Columbia Circuit. He was appointed to this court in October 1986 by President Ronald Reagan. He served as its Chief Judge from July 16, 2001 until February 10, 2008. He is not related to Associate Justice of the Supreme Court Ruth Bader Ginsburg.
Ginsburg graduated from The Latin School of Chicago in 1963. Ginsburg went on to attend Cornell University in 1964-1965 and then 1968-1970, when he received his B.S. degree. He graduated from the University of Chicago Law School in 1973, where he served on the University of Chicago Law Review with Frank Easterbrook. He then became a law clerk for US Supreme Court Justice Thurgood Marshall.
From 1975 to 1983 Ginsburg was a professor at Harvard Law School. From 1983 to 1986 he served in the Reagan administration, as Administrator of the Office of Information and Regulatory Affaris, in the Office of Management and Budget, and as Deputy Assistant Attorney General and Assistant Attorney General in the Antitrust Division of the Department of Justice. Since 1988 he has been an Adjunct Professor at the George Mason University School of Law in Arlington, Virginia, where he teaches a seminar called "Readings in Legal Thought." He is also a Visiting Lecturer and Charles J. Merriam Scholar at the University of Chicago Law School in Chicago, Illinois. Ginsburg has been a visiting professor at Columbia University Law School (1987-88) and a visiting scholar at New York Law School (2006-08). He serves on the advisory boards of the Jevons Institute for Competition Law and Economics, University College London, Faculty of Laws; Law and Economics Center, George Mason University School of Law; Competition Policy International; Journal of Competition Law and Economics; Journal of Law, Economics & Policy; Supreme Court Economic Review; University of Chicago Law Review; and the Harvard Journal of Law & Public Policy.